If your budget is T20 price then you won’t regret getting the T20 model – nice speakers. After 3 years using the T20 I upgraded to T40 at home, the T20’s are now at my office. T40’s are Physically larger (about 32cm high vs. 23cm on the T20), have slightly more grunt (16W per speaker as opposed to 14W on the T20) and 2 woofer drivers as opposed to one on the T20. Also the tweeter on the T20 is positioned at the bottom of the speaker whereas the tweeter on the T40 is centre. The Frequency response is the same on the T20 and T40 (50Hz – 20kHz). The new GigaWorks T series (T10, T20, T40) has an auto-power management feature which is really effective. If audio is not detected within 10 minutes, the speakers power off and when audio is detected they power up again – You could just use the power/vol switch but it works well for heavy users like myself who have them switched on for long periods.Some reviews touch on a lack of bass, but who wants bass to drown out the stunning mids and highs? I’d say these speakers are more for the ‘Audiophile on a Budget who appreciates clear music detail’.